Microbiologist, Doctor of Medical Sciences, Professor Ruben Chailakhyan, who discovered stem stromal cells,  has died in Moscow at the age of 86, TASS has learned from the medical services.

"Ruben Chailakhyan died in his apartment (…). External signs of violent death were not found on his body," said the interlocutor of this news agency.

Chailakhyan was born in 1937. For many years, he was the Head of the Laboratory of Stromal Regulation of Immunity at the Gamaleya National Research Center for Epidemiology and Microbiology of Russia. He is the discoverer of bone marrow stem stromal cells. Thanks to the discoveries of this scientist, cell technology was used for the first time in the world in traumatology and orthopedics.